CN102263507A - Switch type power supply and control method applied therein - Google Patents
Switch type power supply and control method applied therein Download PDFInfo
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- CN102263507A CN102263507A CN2011101402855A CN201110140285A CN102263507A CN 102263507 A CN102263507 A CN 102263507A CN 2011101402855 A CN2011101402855 A CN 2011101402855A CN 201110140285 A CN201110140285 A CN 201110140285A CN 102263507 A CN102263507 A CN 102263507A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000008713 feedback mechanism Effects 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims 3
- 229910044991 metal oxide Inorganic materials 0.000 claims 3
- 150000004706 metal oxides Chemical class 0.000 claims 3
- 238000004804 winding Methods 0.000 description 10
- 239000008186 active pharmaceutical agent Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002832 anti-viral assay Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
- H02M1/0022—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters the disturbance parameters being input voltage fluctuations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/1555—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only for the generation of a regulated current to a load whose impedance is substantially inductive
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A switching power supply and a control method thereof are provided. A switching power supply has an inductor coupled to a line power input. The control method comprises the following steps: providing a voltage divider having a resistor and a controllable resistor connected in series to a connection terminal, wherein the resistance of the controllable resistor is controlled by a control signal and can be changed; generating a limiting signal at the connection end according to the input voltage of the line power supply input end; and controlling the peak value of the current flowing through the inductance element according to the limiting signal.
Description
Technical field
The present invention relates to a kind of power supply unit and utilization method of operation wherein, relate in particular to a kind of switch type power supplying device and the control method of using wherein.
Background technology
Decide Current Control is the desired targets that reach of many power supply units always.For example, for the power supply unit of lighting field, power supply unit provides when luminous just should be certain electric current output, and this decide electric current output not should along with input line voltage (input line voltage) for 100V or 220V changes.
For current power supply unit, merit also is the emphasis that needs are considered because of (power factor).Briefly, one have good merit because of power supply unit, it can be considered as a resistance in equivalence for input civil power (input grid line), its input line voltage and incoming line electric current are roughly homophase (in phase).Good merit because of power supply unit provide power factor correction function (power factor correction, PFC), the electric energy that can effectively use Utilities Electric Co. and given.
Just, how to reach and decide Current Control and power factor correction function, just depend on designer's intention and skill.
Fig. 1 is a kind of framework of known switch type power supplying device 8, and it is a step-down power converter (buck converter).Load 16 among Fig. 1 is an example with a light emitting diode string and an electric capacity.
The electric main that bridge rectifier (bridge rectifier) 12 will exchange end AC is made into direct current, is output in line voltage end IN.The line voltage V of on-Line Voltage end IN
INGenerally have M shape waveform.In the conversion module 10, the power switch 15 of short circuit can make main winding (preliminary winding) PRM energy storage; The power switch 15 of open circuit can make main winding PRM release energy by diode 11.The voltage that feedback module (feedback module) 20 detects load 16 by optical coupler 23, comes Control and Feedback signal (feedback signal) V
FBController 18 can be that (pulse-width modulator, PWM), it is according to feedback signal V for a pulse-width modulator
FB, come the electric current of control flows through main winding PRM.Operating power source of supply 14 has auxiliary winding (auxiliary winding) AUX, produces controller 18 necessary operations voltages (operating voltage) V
CCController 18 detects the current detection signal V of current sense resistor 24
CS, and gate signal V is provided
GATEOpen or close power switch 15.
Fig. 2 known controller 18 of having given an example.Logic control 82 produces gate signal V according to the output of comparator 88 and clock pulse generator 87
GATEThose of ordinary skills as can be known, feedback signal V
FBCan be considered as a kind of restricting signal, it has approximately controlled current detection signal V
CSPeak value, also approximately controlled the current peak of the main winding PRM that flows through.
Summary of the invention
Embodiments of the invention provide a kind of control method, are applicable to a switch type power supplying device, and it has an inductance element, are coupled to a line power input.This control method includes: a voltage divider (voltage divider) is provided, has resistance and a may command resistance, be series at a link, wherein the resistance value of this may command resistance is subjected to control signal control and can changes; According to the input voltage of this line power input, produce a restricting signal in this link; And according to this restricting signal, control flows is through the current peak of this inductance element.
Embodiments of the invention provide a kind of switch type power supplying device, and it controls an inductance element.This switch type power supplying device includes a voltage divider and a peak value controller.This voltage divider has resistance and a may command resistance, is series at a link.The resistance value of this may command resistance is subjected to control signal control and can changes.This voltage divider produces a restricting signal according to a line input voltage of a line power input of this switch type power supplying device in this link.This peak value controller, according to this restricting signal, control flows is through the current peak of this inductance element.
Embodiments of the invention provide a kind of control method, are applicable to a switch type power supplying device, and it has an inductance element, are coupled to a line power input.This control method includes provides a restricting signal; Make a line input voltage homophase of this restricting signal and this line power input; One feedback mechanism is provided, makes the maximum of this restricting signal be roughly certain value, the maximum with this input voltage does not change; And according to this restricting signal, control flows is through the current peak of this inductance element.
Description of drawings
Fig. 1 is a kind of framework of known switch type power supplying device.
Fig. 2 known controller of having given an example.
Fig. 3 is according to a switch type power supplying device of the invention process.
Fig. 4 is the internal circuit of a feedback module for example.
Fig. 5 is some signal waveforms among Fig. 4.
Fig. 6 is the circuit that can replace the right circuit of Fig. 4.
Fig. 7 is the circuit that can replace the left circuit of Fig. 4.
Fig. 8 is according to a switch type power supplying device of the invention process.
Fig. 9 is the controller among Fig. 8.
Figure 10 is a controller, its replaceable Fig. 2 or the controller of Fig. 9.
Reference numeral:
8: the switch type power supplying device
10: the conversion module
11: diode
12: bridge rectifier
14: the operating power source of supply
15: power switch
16: load
18,18a: controller
20: feedback module
23: optical coupler
24: current sense resistor
25: the average current detection device
27: voltage divider
29: resistance
30: amplifier
32: amplifier
34:N type MOSFET
36: the switch type power supplying device
37,37a: voltage divider
38: silicon reference diode
42: comparator
44: or door
60: feedback module
70: the switch type power supplying device
80: controller
82: logic control
87: clock pulse generator
88: comparator
92: counter
94: comparator
98: restricting signal generator
AC: exchange end
AUX: auxiliary winding
AV: end
CS: current detecting end
D0-D3: digital signal
DIN: tie point
FB: feedback end
GATE: grid end
GND: earth terminal
I
CA: current signal
IN: line voltage end
I
OUT: output current
OG: end
OG1: end
PRM: main winding
V
AV: control signal
V
CC: operating voltage
VCC: operating power end
V
CO: voltage signal
V
CS: current detection signal
V
DIN: restricting signal
V
FB: feedback signal
V
FB-DIV: voltage division signal
V
GATE: gate signal
V
IN: line voltage
V
REF-CC: decide current reference voltage
V
REF-CV: decide Voltage Reference voltage
V
REF-LIM: the restriction reference voltage
V
REF-OVER: reference voltage
V
REF-VLY: reference voltage
R
DS: aisle resistance
Embodiment
In following examples, identical or the element or the signal of simileys representative are represented identical or similar elements or signal, and the variation that it is possible is those of ordinary skills, can know by inference according to the instruction of this specification.Be the cause of simplifying, this specification will be not repeated.
Though following embodiment is to be example with step-down power converter (buck converter), these embodiment do not limit the present invention.Generally has power supply unit Chang Shizhe, after reading this specification, also can apply the present invention to the transducer of other kinds, such as boost converter (boost converter), type of voltage step-up (buck-boost converter), inverse-excitation type transducer (flyback converter) or the like.
Fig. 3 is according to a switch type power supplying device 36 of the invention process.With the different place of Fig. 1 feedback module (feedback module) 60 is arranged among Fig. 3.Feedback module (feedback module) 60 just from the voltage of line voltage end IN and end OG detection load 16, by end OG1 and end OG, does not detect the electric current of the load 16 of flowing through, according to this feedback signal V on the Control and Feedback end FB yet
FB, to reach the purpose of deciding output current and voltage.Simultaneously, feedback module 60 also can make feedback signal V
FBLine voltage V with on-Line Voltage end IN
INBe roughly homophase, reach the function of power factor correction function.
The give an example internal circuit of feedback module 60 of Fig. 4.Optical coupler (photo coupler) 23 separates (isolate) left circuit and right circuit.The minimum voltage of left side circuit is the voltage of end OG, and the minimum voltage of right circuit is the voltage of earth connection.
In left circuit, decide Voltage Reference voltage V
REF-CVAnd decide current reference voltage V
REF-CCAll be the voltage of deciding with respect to end OG.Amplifier 32 and voltage divider (voltage divider) 27 roughly amplifies the voltage (from holding IN to end OG) and certain voltage reference voltage V of load 16
REF-CVA pairing target voltage poor.Resistance 29 can be considered as an output current detector, and its voltage is proportional to output current I
OUTValue.Average current detection device 25 also includes the low pass filter (low-pass filter) that a resistance and an electric capacity are constituted.Amplifier 30 and average current detection device 25 roughly amplify output current I
OUTMean value and certain current reference voltage V
REF-CCA pairing target current poor.Optical coupler 23 is amplifier 30 or the result of amplifier 32 is transformed into right circuit.
In right circuit, the output of optical coupler 23 is by electric capacity and resistance institute low-pass filtering, and AV produces control signal V in end
AVVoltage divider 37 is coupled between line voltage end IN and the earth terminal GND, has two resistance and a N type MOSFET 34.Voltage divider 37 produces feedback signal V on feedback end FB
FB, itself and line voltage V
INThe roughly following formula I of relation shown in:
V
FB＝V
IN/K -----------(I)。
Wherein, K is a divisor, is controlled by control signal V
AVAs known to persons of ordinary skill in the art, N type MOSFET 34 can be considered as a controllable resistance, its aisle resistance (channel resistance) R
DSControlled by its grid terminal voltage (gate voltage).So, control signal V
AVControlled the aisle resistance R of N type MOSFET 34
DS, the control that also is equal to divisor K.Gate voltage is high more, aisle resistance R
DSMore little, K is just more little.And voltage divider 37 can make feedback signal V
FBWith line voltage V
INAbout homophase.
Fig. 5 is some signal waveforms among Fig. 4; Wherein, line voltage V
INThe voltage signal of expression line voltage end IN; Feedback signal V
FBSignal on the expression feedback end FB; Current detection signal V
CSBe illustrated in the voltage signal on the current detecting end CS; Output current I
OUTExpression is flowed through end OG1 to the electric current between the OG, also is the electric current of load 16 of flowing through; Current signal I
CAThe electric current that expression amplifier 30 is drawn; Control signal V
AVBe the gate voltage signal on the N type MOSFET 34.
From Fig. 5, can find feedback signal V
FBWith line voltage V
INIt almost is homophase.In addition, as line voltage V
INMaximum when diminishing, for example when 220V becomes 110V, feedback signal V
FBAt the beginning can be along with line voltage V
INAnd descend, still, because output current I
OUTSo the reason that diminishes is control signal V
AVCan be gradually descend, make the aisle resistance R of N type MOSFET 34
DSGradually increase, and then increased feedback signal V gradually
FBMaximum, can approximately get back to line voltage V at last
INThe value of maximum before changing.Signal feedback path from Fig. 4 can be known by inference, no matter be line voltage V
INMaximum be 220V, 100V or 90V, decide electric current when output in stable state because the reason of feedback mechanism, feedback signal V
FBMaximum approximately all can be a definite value, and this definite value also can be so that current detection signal V
CSThe maximum of peak value approximately is a constant, can be along with line voltage V
INAnd change.
The circuit that Fig. 6 is shown can replace the right circuit of Fig. 4.Among the voltage divider 37a, the brightness of the photophore in the optical coupler 23 is equal to the equivalent resistance of having controlled receiver, so be equal to divisor the K (=V that has controlled voltage divider 37a
IN/ V
FB).
The circuit that Fig. 7 is shown can replace the left circuit of Fig. 4.As output current I
OUTToo high, make the voltage signal V that average current detection device 25 is exported
COWhen surpassing 2.5V, LT431 makes that the photophore in the optical coupler 23 is luminous; When the voltage of load 16 (from end IN to end OG) surpassed the corresponding voltage that silicon reference diode 38 sets, silicon reference diode 38 conductings made the photophore in the optical coupler 23 luminous.And optical coupler 23 can influence the resistance value of the may command resistance of voltage divider 37 or 37a.
In one embodiment, the right circuit of Fig. 4 replaces with Fig. 6, and the left circuit of Fig. 4 is replaced with Fig. 7.
Fig. 8 is according to a switch type power supplying device 70 of the invention process.Different with Fig. 1, the embodiment among Fig. 8 can not have operating power supply 14 and feedback module (feedback module) 20, and controller 80 can not need feedback end FB, just can reach PFC and decide electric current output control.
Fig. 9 is the controller 80 among Fig. 8, and it includes restricting signal generator 98 and controller 18.Controller 18 among Fig. 9 can have identical inner member with the controller 18 among Fig. 2, so its operating principle no longer repeats.Be not both the controller 18 receiving feedback signals V among Fig. 2
FB, and the restricting signal V that the controller 18 among Fig. 9 receives on the tie point DIN
DINSimilar with Fig. 2, restricting signal V
DINControl current detection signal V
CSPeak value, also equal to have controlled the current peak of main winding PRM of flowing through.
Restricting signal generator 98 provides a feedback mechanism, can make restricting signal V
DINMaximum, approximately maintain a definite value.With Fig. 9 is example, even if restricting signal V
DINAlong with line voltage V
INThe waveform (M-like wave form) of M shape is arranged, and when stable state, restricting signal generator 98 can make restricting signal V
DINMaximum approximate the reference voltage V of an input that is positioned at comparator 94 greatly
REF-OVERBelow with reference voltage V
REF-OVEREqual 2V, and reference voltage V
REF-VLYEqual 0.1V, illustrate.
As restricting signal V
DINWhen surpassing 2V, SR flip-flop (SR flip-flop) will keep output Q in logic 1.A period of time afterwards, restricting signal V
DINWill be along with line voltage V
INDescend and descend.As restricting signal V
DINWhen being lower than 0.1V, 92 times numbers of counter (count down), the digital signal D0-D3 of its output becomes control signal, makes tie point DIN reduce to the equivalent resistance of earth terminal GND.Simultaneously, the output of SR flip-flop can be compared device 96 be reset in logic 0.Therefore, restricting signal V afterwards
DINMaximum, will be than restricting signal V before
DINMaximum come low.
Opposite, as restricting signal V
DINNever surpass 2V, the output of SR flip-flop will maintain always in logic 0.So, as restricting signal V
DINWhen being lower than 0.1V, number (count up) on the counter 92 makes tie point DIN raise to the equivalent resistance of earth terminal GND.Therefore, restricting signal V afterwards
DINMaximum will uprise.
Therefore, comparator 94 with 96, SR flip-flop and counter 92, can be considered as a maximum controller.It provides a feedback mechanism, makes restricting signal V
DINMaximum be approximately 2V.
So, when stable state, restricting signal V
DINThough maximum can not be equal to 2V, big appointment is hesitated back about 2V (ripple), will can be along with line voltage V
INMaximum change and change.Also because restricting signal V
DINMaximum approximately be exactly 2V, so current detection signal V
CSThe maximum of peak value also approximately be a fixed value, so can reach the function of deciding electric current output.
In addition, because restricting signal V
DINBe branch line ball voltage V
INAnd producing, so restricting signal V
DINCan line voltage V
INHomophase, so, can be contemplated that current detection signal V
CSMean value approximately also can with line voltage V
INHomophase can reach the function of PFC.
Figure 10 is a controller 18a, and its replaceable Fig. 2 or the controller of Fig. 9 18 go in the embodiments of the invention.Different with controller 18, controller 18a increased comparator 42 and or the door (OR gate) 44, be used for probably limiting current detection signal V
CSPeak value can not surpass restriction reference voltage V
REF-LIMIf with Fig. 9, still controller 18 wherein replaces with the controller 18a of Figure 10, and a such embodiment explains orally.If restricting signal generator 98 makes restricting signal V
DINMaximum approximately be exactly the result of 2V, caused voltage division signal V
FB-DIVThe about 250mV of maximum is arranged, and restriction reference voltage V
REF-LEMValue be assumed to 200mV.So, as voltage division signal V
FB-DIVDuring less than 200mV, current detection signal V
CSPeak value will voltage division signal V
FB-DIVChange and change.As voltage division signal V
FB-DIVDuring greater than 200mV, current detection signal V
CSThe peak value 200mV that will only have an appointment at most.The example PF of even now may reduce, but the benefit that has is prevention 16 moments of load to bear too high electric current and burn.In another embodiment, restriction reference voltage V
REF-LIMCan exceed voltage division signal V
FB-DIVMaximum.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a control method is applicable to a switch type power supplying device, and it has an inductance element, is coupled to a line power input, and this control method includes:
One voltage divider (voltage divider) is provided, has resistance and a may command resistance, be series at a link, wherein the resistance value of this may command resistance is subjected to control signal control and can changes;
According to the input voltage of this line power input, produce a restricting signal in this link; And
According to this restricting signal, control flows is through the current peak of this inductance element.
2. control method according to claim 1, wherein, this switch type power supplying device drives a light emitting diode string, and this method also includes:
According to the voltage of this light emitting diode string or according to the electric current of this light-emitting diode of flowing through, change this control signal.
3. control method according to claim 2 wherein includes:
According to the voltage of this light emitting diode string or according to the electric current of this light-emitting diode of flowing through,, change this control signal by an optical coupler.
4. control method according to claim 1 wherein includes:
According to the maximum of this restricting signal, change this control signal, so that this maximum is a fixed value.
5. a switch type power supplying device is controlled an inductance element, includes:
One voltage divider, has resistance and a may command resistance, be series at a link, wherein the resistance value of this may command resistance is subjected to control signal control and can changes, this voltage divider produces a restricting signal according to a line input voltage of a line power input of this switch type power supplying device in this link; And
One peak value controller, according to this restricting signal, control flows is through the current peak of this inductance element.
6. switch type power supplying device according to claim 5 wherein also includes:
One output voltage detector is in order to detect the voltage of an output loading;
One output current detector is in order to the flow through electric current of this output loading of detection; And
At least one amplifier according to the result of this output voltage detector or this output current detector, is controlled this control signal.
7. switch type power supplying device according to claim 5, wherein, this may command resistance includes a metal-oxide half field effect transistor (MOS FET), and this control signal is delivered to this metal-oxide half field effect transistor, the passage equivalent resistance of linear this metal-oxide half field effect transistor of change.
8. switch type power supplying device according to claim 5 wherein also includes counter about in the of (up/down counter), and several digital signals of its output are as this control signal.
9. switch type power supplying device according to claim 5 wherein includes a maximum controller, and it provides a feedback mechanism, and the maximum that makes this restricting signal is a fixed value.
10. a control method is applicable to a switch type power supplying device, and it has an inductance element, is coupled to a line power input, and this control method includes:
One restricting signal is provided;
Make a line input voltage homophase of this restricting signal and this line power input;
One feedback mechanism is provided, and the maximum that makes this restricting signal is a certain value, and the maximum with this line input voltage does not change; And
According to this restricting signal, control flows is through the current peak of this inductance element.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34920910P | 2010-05-28 | 2010-05-28 | |
| US61/349,209 | 2010-05-28 | ||
| US201161429188P | 2011-01-03 | 2011-01-03 | |
| US61/429,188 | 2011-01-03 | ||
| TW100202828U TWM412550U (en) | 2010-05-28 | 2011-02-16 | Voltage converter |
| TW100202828 | 2011-02-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102263507A true CN102263507A (en) | 2011-11-30 |
| CN102263507B CN102263507B (en) | 2014-07-16 |
Family
ID=45010006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110140285.5A Expired - Fee Related CN102263507B (en) | 2010-05-28 | 2011-05-27 | Switch type power supply and control method applied therein |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US8482208B2 (en) |
| CN (1) | CN102263507B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI504115B (en) * | 2013-03-21 | 2015-10-11 | Hep Tech Co Ltd | Constant current power supply device |
| JP2015076923A (en) * | 2013-10-07 | 2015-04-20 | ローム株式会社 | Switching converter, control circuit and control method for the same, and lighting device and electronic apparatus using the same |
| WO2017207713A1 (en) | 2016-06-01 | 2017-12-07 | Ascensia Diabetes Care Holdings Ag | Systems, apparatus, and methods for powering electronic devices with low voltage batteries |
| TWI672894B (en) * | 2018-07-25 | 2019-09-21 | 通嘉科技股份有限公司 | Power controllers and control methods thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140511A (en) * | 1990-05-11 | 1992-08-18 | Samsung Electronics | Switched mode power supply having a discharge circuit for an auxiliary power source |
| US6597235B2 (en) * | 2001-01-27 | 2003-07-22 | Samsung Electronics Co., Ltd. | Voltage boost circuits using multi-phase clock signals |
| CN201388313Y (en) * | 2009-04-17 | 2010-01-20 | 上海晶丰明源半导体有限公司 | High-efficiency constant-current LED driving circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7242150B2 (en) * | 2005-05-12 | 2007-07-10 | Lutron Electronics Co., Inc. | Dimmer having a power supply monitoring circuit |
| WO2009138104A1 (en) * | 2008-05-14 | 2009-11-19 | Lioris B.V. | Led-based lighting system with high power factor |
| US8698421B2 (en) * | 2010-04-30 | 2014-04-15 | Infineon Technologies Austria Ag | Dimmable LED power supply with power factor control |
-
2011
- 2011-05-08 US US13/103,100 patent/US8482208B2/en not_active Expired - Fee Related
- 2011-05-27 CN CN201110140285.5A patent/CN102263507B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140511A (en) * | 1990-05-11 | 1992-08-18 | Samsung Electronics | Switched mode power supply having a discharge circuit for an auxiliary power source |
| US6597235B2 (en) * | 2001-01-27 | 2003-07-22 | Samsung Electronics Co., Ltd. | Voltage boost circuits using multi-phase clock signals |
| CN201388313Y (en) * | 2009-04-17 | 2010-01-20 | 上海晶丰明源半导体有限公司 | High-efficiency constant-current LED driving circuit |
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| Publication number | Publication date |
|---|---|
| US8482208B2 (en) | 2013-07-09 |
| CN102263507B (en) | 2014-07-16 |
| US20110291590A1 (en) | 2011-12-01 |
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